APEC Top Tier Alkaline Mineral pH+ 75 GPD 6-Stage Ultra Safe Reverse Osmosis Drinking Water Filter System (ESSENCE ROES-PH75) Supreme quality  designed, engineered and assembled in USA to guarantee water safety & your health. 75 GPD 6-stage system removes up to 99% of bacteria, viruses, cysts, organics, chemicals & more. Feed Water Pressure: 40-85 psi. US made cartridge uses food-grade calcium from trusted source for safe, proven water pH enhancement. Enjoy ultra-pure drinking water with added calcium minerals for improved ALKALINITY and great taste. Premium long lasting filters used to treat tap/well water. Provide unlimited clean drinking water. America's No.1 rated water filter brand with 20 years of success guaranteeing trouble free, noise-free system for long lasting, dependable, pure drinking water. 2 year extended manufacturer warranty with registration. System comes with all parts and industry's best instructions and videos for an easy DIY experience. System comes with 100% lead-free designer faucet, plus FDA Certified JG Food grade tubing and parts to provide safe, contamination-free pure water. High quality leak-free quick connect fittings require no extra lock clips to seal leak, and does not rely on water leak detector to protect your home like other brands.